docs: def signalify_fetch_all(queryset, parser=None, **context):
      """Signal lazy load when `QuerySet._fetch_all` fetches rows. Note: patch
      `_fetch_all` instead of `iterator` since, as of Django 1.11, the former is
      used for all fetches while the latter is not.
      """
      func = queryset._fetch_all
      @functools.wraps(func)
      def wrapped(*args, **kwargs):
          if queryset._result_cache is None:
              signals.lazy_load.send(
                  get_worker(),
                  args=args,
                  kwargs=kwargs,
                  ret=None,
                  context=context,
                  parser=parser,
              )
          return func(*args, **kwargs)
      return wrapped